Why scientists say Oumuamua could be an alien spaceship Daily Mail Online.
After all, it could even turn out to be some sort of intergalactic Marie Celeste, the infamous ghost ship found drifting with no crew. Even if we find an artefact that was left over some space device or junk from an alien civilisation and there are no signs of life on it, that would be the greatest thrill I can imagine having in my lifetime, he says.

The Derelict Alien Anthology Wiki FANDOM powered by Wikia.
Giger called the Egg-Silo" Due to the time and budget, the pyramid was dropped from the story when the script was rewritten and retitled to Alien. Because of the loss of the pyramid, Ridley had to come up with a way of explaining why an Alien ship had the eggs of a dangerous lifeform on it, which sparked his idea of an Egg-Bomber.

Alien film Wikipedia.
28 30 33 Shusett came up with the idea that one of the crew members could be implanted with an alien embryo that would burst out of him; he thought this would be an interesting plot device by which the alien could get aboard the ship.